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47932981 is a prime number
BaseRepresentation
bin1011011011011…
…0011000110101
310100012020200121
42312312120311
544232323411
64431211541
71121265205
oct266663065
9110166617
1047932981
1125069838
1214076bb1
139c13615
14651a405
15431c571
hex2db6635

47932981 has 2 divisors, whose sum is σ = 47932982. Its totient is φ = 47932980.

The previous prime is 47932967. The next prime is 47933021. The reversal of 47932981 is 18923974.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35892081 + 12040900 = 5991^2 + 3470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-47932981 is a prime.

It is a super-2 number, since 2×479329812 = 4595141335092722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47932961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23966490 + 23966491.

It is an arithmetic number, because the mean of its divisors is an integer number (23966491).

Almost surely, 247932981 is an apocalyptic number.

It is an amenable number.

47932981 is a deficient number, since it is larger than the sum of its proper divisors (1).

47932981 is an equidigital number, since it uses as much as digits as its factorization.

47932981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 47932981 is about 6923.3648611062. The cubic root of 47932981 is about 363.2548986673.

The spelling of 47932981 in words is "forty-seven million, nine hundred thirty-two thousand, nine hundred eighty-one".